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Tracking distance-measuring equipment system with means for setting a window and means for sampling image signals at predetermined time intervals

  • US 5,023,712 A
  • Filed: 03/06/1990
  • Issued: 06/11/1991
  • Est. Priority Date: 03/07/1989
  • Status: Expired due to Term
First Claim
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1. A tracking distance-measuring system for measuring a distance from a moving target on the principle of triangulation by electrically detecting a respective dislocation of first and second images individually focused on first and second image sensors (3,4) by first and second juxtaposed optical systems (1,2) and comparing corresponding first and second image signals provided by the image sensors, said tracking distance-measuring system comprising:

  • means for setting a window in a specific portion of either the first or second image signal;

    means for determining the distance from the moving target by comparing the first and second image signals on the basis of an image signal in the window; and

    means for sampling the image signals periodically at predetermined time intervals for comparing the image signal within the window set at a sampling point and an image signal at the next sampling point to set a new window in a portion of the image signals best coinciding with each other for determining the direction and distance of movement of the target from a variation.

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